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Worksheet 15 Life Process Important question 100% success @CBSE@NEET BASICS

 Life Process 1. Why does the small and single celled animals such as amoeba, not require any respiratory pigment? Ans: The amoeba does not require any respiratory pigment to transport oxygen. The possible reason could be that their body size and number of cells are small. Its oxygen requirement is met by diffusion. 2. Where do the respiratory pigments combine reversible with oxygen? Ans : Respiratory pigments are coloured proteins capable of combing reversibly with oxygen, hence increasing the amount of oxygen that can be carries by the blood. 3. Why does the air passage not collapse when there is no air in it? Ans: The air passage, i.e. trachea is supported by incomplete C-shaped cartilaginous rings, which prevent its collapsing in the absence of air. 4. While breathing out, point out the change you think occur in diaphragm and intercostal muscles. Ans: The diaphragm and intercostal muscles relax when we breathe out. This compresses the chest cavity forcing the air out of lungs. 5.
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Practice Worksheet for Exam 2024 CBSE Boards All Chemistry

Image
  1.   Sodium and chlorine are reacted, and as a result, sodium chloride is formed, which is also called table salt. What option gives the reactants and products of the reaction? (a) Reactants – sodium; products – chlorine (b) Reactants – sodium and table salt; products – chlorine (c) Reactants – tables salt; products – sodium and chlorine (d) Reactants – sodium and chlorine; products – sodium chloride 2. Which of the following reaction can also be termed a thermal decomposition reaction? (a) Combination reaction               (b) Decomposition reaction (c) Displacement reaction              (d) Double displacement reaction 3. The image shows some chemical reactions. Which option identifies the reactants and products of the reactions? Q4) A student performs an experiment to form aluminium chloride from aluminium and chlorine. Which of the following option gives the chemical equation of the reaction? (a) Al + Cl 2   → AlCl 2                  (b) 2Al + Cl 2   →
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Worksheet 18 Mendel's Law @CBSE TOPPER @ CBSE @NEET Exam 100 % Success

  Law of inheritance( Mendel's  law) First law of inheritance -   Mendel's law of dominance states that:  “ When parents with pure, contrasting traits are crossed together, only one form of trait appears in the next generation" .  The hybrid offsprings will exhibit only the dominant trait in the phenotype.”  Law of dominance is known as the first law of inheritance. Second law of inheritance- Law of segregation is the second law of inheritance.  "Law of segregation states that the pair of alleles segregates from each other during meiosis (gamete formation) so that only one factor will be present in each gamete".   Third law of inheritance:- The Law of Independent Assortment states that  "during a dihybrid cross (crossing of two pairs of traits), an assortment of each pair of traits is independent of the other" .  In other words, during gamete formation, one pair of trait segregates from another pair of traits independently. very important Q/A
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